This extension was constructed after investigations in 1891 and 1892 by the Minister for Works into the state of roads in the fruit growing district which saw the Simpson's Railway Act passed on 13 June 1893.

The Carlingford line was opened on 16 April 1896 but due to the increased costs and poor return from the freight and passenger service, it was decided not to proceed with the remaining sections.

[3] Immediately adjacent to the timber building on the Rydalmere (Down) end of the building is a modern passenger waiting area with a gabled, galvanised metal roof canopy with a post supported awning to the platform side and vertical timber board ends.

[3] The platform is brick faced with pedestrian access at grade by crossing an operational railway line.

[3] The pedestrian crossing with concrete approaches over the single line track is located just off the Down end of the platform.

[3] Dundas railway station was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria.

The original atypical "Type 8 – Narrow Awning Building" was destroyed by fire and largely reconstructed in 2007.

[3] The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales.

[3] The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales.

[3] The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.

[3] This Wikipedia article contains material from Dundas Railway Station, entry number 01133 in the New South Wales State Heritage Register published by the State of New South Wales (Department of Planning and Environment) 2018 under CC-BY 4.0 licence, accessed on 2 June 2018.